雅思长难句句式分析之than和as作准关系代词_100留学
雅思长难句句式分析之than和as作准关系代词
摘要：Than，as和but其实还可以作准关系代词。条件是它们之前需要有先行词。
以下就是100留学为大家整理的雅思长难句句式分析之than和as作准关系代词。希望对各位考生的备考有所帮助：than和as作准关系代词Than，as和but其实还可以作准关系代词。条件是它们之前需要有先行词。1 than作准关系代词Than作准关系代词时相当于：“than + the + 前面的名词 + 关系代词（who、whom、which等）。换句话说，我们可以把than视为关系代词，它可以在所引导的从句中作主语、宾语或be动词后的表语。Ihave more books than are needed. =Ihave more books than the books which are needed.该句子中，than作主语，后面有谓语are needed。Ihave more books than he needs. =Ihave more books than the books which he needs.该句子中，than作needs的宾语。Sheis a better student than you are. = Sheis a better student than the student that you are.此处than作表语，that实际为be动词后are的表语。Sheis a better student than you.如果前后两个半句的谓语动词一致，前面为is，后面为are，都是be动词，故后面的are可以省略。2 as作准关系代词与than类似，as作准关系代词时相当于：“as+ the + 前面的名词 + 关系代词（who、whom、which等）。换句话说，我们也可以把as视为关系代词，它可以在所引导的从句中作主语、宾语或be动词后的表语。当as作准关系代词时，一般用在下面三个短语中：1） such + n. + as…&&&&&&&&&&（像……那样的……）2） the same + n. + as…&&&&&&&（和……相同的……）3） as + adj. + n. + as…&&&&&&（和……一样的……）2.1 such + n. + as…Nobodylikes such a man as tells lies. =Nobodylikes such a man as the man who tells lies.（作主语）Everybodyloves such an honest man as you mentioned. = Everybodyloves such an honest man as the man whom you mentioned.（作宾语）Inmy school there is not such a student as David (is). =Inmy school there is not such a student as the student that David (is).（作表语）前后都是be动词，故可以省略后面的is。课堂练习1.Not until the eighteenth century, however,did such banks as the Bank of Amsterdam and the Bank of England begin toprovide capital for business investment.课堂练习2The possibility that mass extinctions mayrecur periodically has given rise to such hypotheses as that of a companionstar with a long-period orbit deflecting other bodies from their normal orbits,making some of them fall to Earth as meteors and causing widespread devastationupon impact.2.2 the same + n. + as…I have the same book as is laid on the desk.（作主语）I have the same book as you bought last week.（作宾语）I have the same book as this one (is).（作表语）课堂练习1.Operating on the same principle as windturbines, the power in sea turbines comes from tidal currents which turn bladessimilar to ships' propellers, but unlike wind, the tides are predictable andthe power input is constant.2.3 as + n. + as…Heis as tough a guy as ever lived.（作主语）Ihave as good a dictionary as you (do).（作宾语）这里的do等于及物动词have，因前后行为动词一致，后年往往会改为do的一个变体do, does或did，并且可以省略。He is as good a man as David (is).（作表语）2.4 as可代替主句单独使用as时，as也可以作关系代词，类似于which，用来代替整个主句。Heis nice, which is known to us. = Heis nice, as is known to us.这里which和as都是修饰前面的主句的。Heworks hard, which we all know. = Heworks hard, as we all know. = As we all know, he works hard. as引导的从句可前可后，而which引导的从句只能在后面。课堂练习1.The central state, though often very richand very populous, was intrinsically fragile, since the development of newinternational trade routes could undermine the monetary base and erode statepower, as occurred when European seafarers circumvented Middle Easternmerchants after Vasco da Gama's voyage around Africa in the latefifteenth-century opened up a southern route.2.5 As + be + p.p.时，be动词可以省略。Heis nice, which was mentioned before. =Heis nice, as was mentioned before. =Heis nice, as mentioned before.Hewas drunk, as usual. =Hewas drunk, as is usual.以上是100留学为大家整理的雅思长难句句式分析之than和as作准关系代词。更多雅思备考内容，请继续关注100留学教育。
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as引导的从句
请讲解一下as引导的定语从句
提问时间： 11:04:36提问者：
同学你好，&As&可以用作关系代词引导定语从句。一：as可以代替整个句子或一件事，引导非限制性定语从句，在从句中作主语、宾语或表语，意为&正如&&，就像&&，据&&&；从句位置可置于主句之前或之后，有时也可作为插入语置于句中，一般用逗号和主句隔开。as的这种用法常见于以下这些结构:as we can see, as can be seen, as we know, as is（well） known,as may be imagined,as often happens,as has been said before,as was mentioned above,as is often the case,as/indeed it is,etc.多看一些例句:As is well known，great changes have taken place in China.or:Great changes,as is well known,have taken place in China.众所周知，中国发生了巨大的变化。( as在定语从句中作主语。)This experiment is very simple，as indeed it is.实验非常简单，事实上也确实如此。(as在定语从句中作表语。)注意：① which在引导非限制性定语从句时，也有和as一样的功能，可以代替整个句子，但which只能用在主句之后。②在as所引导的非限制性定语从句中，如果运用的是被动语态结构，be动词可以省略；但which没有此用法，be动词不可省。例如:She married him，which was unexpected.＝She married him as（was） unexpected.她嫁给了她，这一点大家都没有料到。（作主语，代替前面的句子；用which时was不可省。）二 as除了代替整个句子，也可以代替主句中一个特定的词。as在它引导的定语从句（限制性或非限制性）中可以充当主语，宾语和表语；在这种用法中它经常和such, so, the same等词搭配使用；且当先行词中有such, so, the same等词修饰时，关系代词通常必须用as。例如:1. They were satisfied with this decision，as was agreed beforehand.他们对这个决定都满意，这事先已经经过他们同意了。( as在定语从句中作主语，其先行词是this decision)2. I never heard such stories as he tells.我从未听过他讲的这类故事。( as在定语从句中作宾语，先行词是such stories.)3.The place doesn't look the same as it was before liberation.这个地方看上一去和解放前大不一样了。( as在定语从句中作表语，先行词是same)4.Have you bought the same book as I referred to yesterday?你有没有买我昨天说的那本书啊？( as在定语从句中作宾语，先行词是book)& 欢迎登陆新东方在线欢迎到新东方在线论坛感谢您对新东方在线的支持和信任如您的问题未能得到妥善解决或有其他问题请访问：或联系售后客服：400 676 2300
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